1. Emulsification preparation
In a dispersing reactor, deionized water, emulsifier and protective colloid are mixed into an emulsion.
2. Seed emulsion polymerization
Add seed liquid to reactor, use initiator to start free radical polymerization, and form preliminary particle nuclei.
3. Drop polymerization
Under stirring and constant temperature conditions, vinyl acetate monomer and remaining emulsion are continuously added to reactor.
4. Constant temperature reaction
Control the reaction temperature (generally 60~80℃) to ensure full conversion of the monomer.
5. Post-treatment
After the reaction is completed, cool down, add pH adjuster, preservative, etc., and filter to obtain the finidhed emulsion.
6. Storage and packaging
After storage in a storage tank, it is packaged in barrels or IBC tanks.